1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * AMD ACPI support for ACPI2platform device.
  4 *
  5 * Copyright (c) 2014,2015 AMD Corporation.
  6 * Authors: Ken Xue <Ken.Xue@amd.com>
  7 *	Wu, Jeff <Jeff.Wu@amd.com>
  8 */
  9
 10#include <linux/clk-provider.h>
 11#include <linux/platform_data/clk-fch.h>
 12#include <linux/platform_device.h>
 13#include <linux/pm_domain.h>
 14#include <linux/clkdev.h>
 15#include <linux/acpi.h>
 16#include <linux/err.h>
 17#include <linux/io.h>
 18#include <linux/pm.h>
 19
 20#include "internal.h"
 21
 22ACPI_MODULE_NAME("acpi_apd");
 23struct apd_private_data;
 24
 25/**
 26 * ACPI_APD_SYSFS : add device attributes in sysfs
 27 * ACPI_APD_PM : attach power domain to device
 28 */
 29#define ACPI_APD_SYSFS	BIT(0)
 30#define ACPI_APD_PM	BIT(1)
 31
 32/**
 33 * struct apd_device_desc - a descriptor for apd device
 34 * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
 35 * @fixed_clk_rate: fixed rate input clock source for acpi device;
 36 *			0 means no fixed rate input clock source
 37 * @setup: a hook routine to set device resource during create platform device
 38 *
 39 * Device description defined as acpi_device_id.driver_data
 40 */
 41struct apd_device_desc {
 42	unsigned int flags;
 43	unsigned int fixed_clk_rate;
 44	struct property_entry *properties;
 45	int (*setup)(struct apd_private_data *pdata);
 46};
 47
 48struct apd_private_data {
 49	struct clk *clk;
 50	struct acpi_device *adev;
 51	const struct apd_device_desc *dev_desc;
 52};
 53
 54#if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
 55#define APD_ADDR(desc)	((unsigned long)&desc)
 56
 57static int acpi_apd_setup(struct apd_private_data *pdata)
 58{
 59	const struct apd_device_desc *dev_desc = pdata->dev_desc;
 60	struct clk *clk;
 61
 62	if (dev_desc->fixed_clk_rate) {
 63		clk = clk_register_fixed_rate(&pdata->adev->dev,
 64					dev_name(&pdata->adev->dev),
 65					NULL, 0, dev_desc->fixed_clk_rate);
 66		clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
 67		pdata->clk = clk;
 68	}
 69
 70	return 0;
 71}
 72
 73#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
 74
 75static int misc_check_res(struct acpi_resource *ares, void *data)
 76{
 77	struct resource res;
 78
 79	return !acpi_dev_resource_memory(ares, &res);
 80}
 81
 82static int fch_misc_setup(struct apd_private_data *pdata)
 83{
 84	struct acpi_device *adev = pdata->adev;
 85	const union acpi_object *obj;
 86	struct platform_device *clkdev;
 87	struct fch_clk_data *clk_data;
 88	struct resource_entry *rentry;
 89	struct list_head resource_list;
 90	int ret;
 91
 92	clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
 93	if (!clk_data)
 94		return -ENOMEM;
 95
 96	INIT_LIST_HEAD(&resource_list);
 97	ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
 98				     NULL);
 99	if (ret < 0)
100		return -ENOENT;
101
102	if (!acpi_dev_get_property(adev, "is-rv", ACPI_TYPE_INTEGER, &obj))
103		clk_data->is_rv = obj->integer.value;
104
105	list_for_each_entry(rentry, &resource_list, node) {
106		clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
107					      resource_size(rentry->res));
108		break;
109	}
110
111	acpi_dev_free_resource_list(&resource_list);
112
113	clkdev = platform_device_register_data(&adev->dev, "clk-fch",
114					       PLATFORM_DEVID_NONE, clk_data,
115					       sizeof(*clk_data));
116	return PTR_ERR_OR_ZERO(clkdev);
117}
118
119static const struct apd_device_desc cz_i2c_desc = {
120	.setup = acpi_apd_setup,
121	.fixed_clk_rate = 133000000,
122};
123
124static const struct apd_device_desc wt_i2c_desc = {
125	.setup = acpi_apd_setup,
126	.fixed_clk_rate = 150000000,
127};
128
129static struct property_entry uart_properties[] = {
130	PROPERTY_ENTRY_U32("reg-io-width", 4),
131	PROPERTY_ENTRY_U32("reg-shift", 2),
132	PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
133	{ },
134};
135
136static const struct apd_device_desc cz_uart_desc = {
137	.setup = acpi_apd_setup,
138	.fixed_clk_rate = 48000000,
139	.properties = uart_properties,
140};
141
142static const struct apd_device_desc fch_misc_desc = {
143	.setup = fch_misc_setup,
144};
145#endif
146
147#ifdef CONFIG_ARM64
148static const struct apd_device_desc xgene_i2c_desc = {
149	.setup = acpi_apd_setup,
150	.fixed_clk_rate = 100000000,
151};
152
153static const struct apd_device_desc vulcan_spi_desc = {
154	.setup = acpi_apd_setup,
155	.fixed_clk_rate = 133000000,
156};
157
158static const struct apd_device_desc hip07_i2c_desc = {
159	.setup = acpi_apd_setup,
160	.fixed_clk_rate = 200000000,
161};
162
163static const struct apd_device_desc hip08_i2c_desc = {
164	.setup = acpi_apd_setup,
165	.fixed_clk_rate = 250000000,
166};
167
168static const struct apd_device_desc hip08_lite_i2c_desc = {
169	.setup = acpi_apd_setup,
170	.fixed_clk_rate = 125000000,
171};
172
173static const struct apd_device_desc thunderx2_i2c_desc = {
174	.setup = acpi_apd_setup,
175	.fixed_clk_rate = 125000000,
176};
177
178static const struct apd_device_desc nxp_i2c_desc = {
179	.setup = acpi_apd_setup,
180	.fixed_clk_rate = 350000000,
181};
182
183static const struct apd_device_desc hip08_spi_desc = {
184	.setup = acpi_apd_setup,
185	.fixed_clk_rate = 250000000,
186};
187#endif
188
189#else
190
191#define APD_ADDR(desc) (0UL)
192
193#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
194
195/**
196* Create platform device during acpi scan attach handle.
197* Return value > 0 on success of creating device.
198*/
199static int acpi_apd_create_device(struct acpi_device *adev,
200				   const struct acpi_device_id *id)
201{
202	const struct apd_device_desc *dev_desc = (void *)id->driver_data;
203	struct apd_private_data *pdata;
204	struct platform_device *pdev;
205	int ret;
206
207	if (!dev_desc) {
208		pdev = acpi_create_platform_device(adev, NULL);
209		return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
210	}
211
212	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
213	if (!pdata)
214		return -ENOMEM;
215
216	pdata->adev = adev;
217	pdata->dev_desc = dev_desc;
218
219	if (dev_desc->setup) {
220		ret = dev_desc->setup(pdata);
221		if (ret)
222			goto err_out;
223	}
224
225	adev->driver_data = pdata;
226	pdev = acpi_create_platform_device(adev, dev_desc->properties);
227	if (!IS_ERR_OR_NULL(pdev))
228		return 1;
229
230	ret = PTR_ERR(pdev);
231	adev->driver_data = NULL;
232
233 err_out:
234	kfree(pdata);
235	return ret;
236}
237
238static const struct acpi_device_id acpi_apd_device_ids[] = {
239	/* Generic apd devices */
240#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
241	{ "AMD0010", APD_ADDR(cz_i2c_desc) },
242	{ "AMDI0010", APD_ADDR(wt_i2c_desc) },
243	{ "AMD0020", APD_ADDR(cz_uart_desc) },
244	{ "AMDI0020", APD_ADDR(cz_uart_desc) },
245	{ "AMD0030", },
246	{ "AMD0040", APD_ADDR(fch_misc_desc)},
247	{ "HYGO0010", APD_ADDR(wt_i2c_desc) },
248#endif
249#ifdef CONFIG_ARM64
250	{ "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
251	{ "BRCM900D", APD_ADDR(vulcan_spi_desc) },
252	{ "CAV900D",  APD_ADDR(vulcan_spi_desc) },
253	{ "CAV9007",  APD_ADDR(thunderx2_i2c_desc) },
254	{ "HISI02A1", APD_ADDR(hip07_i2c_desc) },
255	{ "HISI02A2", APD_ADDR(hip08_i2c_desc) },
256	{ "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) },
257	{ "HISI0173", APD_ADDR(hip08_spi_desc) },
258	{ "NXP0001", APD_ADDR(nxp_i2c_desc) },
259#endif
260	{ }
261};
262
263static struct acpi_scan_handler apd_handler = {
264	.ids = acpi_apd_device_ids,
265	.attach = acpi_apd_create_device,
266};
267
268void __init acpi_apd_init(void)
269{
270	acpi_scan_add_handler(&apd_handler);
271}